SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
13	OIL AND GAS EXTRACTION	6,111
15	GENERAL BUILDING CONTRACTORS	9,010	458
16	HEAVY CONSTRUCTION CONTRACTORS	13,679	874
17	SPECIAL TRADE CONTRACTORS	7,449
24	LUMBER AND WOOD PRODUCTS	5,121	3,073
26	PAPER AND ALLIED PRODUCTS	1,090
28	CHEMICALS AND ALLIED PRODUCTS	3,276	189
30	RUBBER AND MISC. PLASTICS PRODUCTS	408
32	STONE, CLAY, AND GLASS PRODUCTS	1,890	6
34	FABRICATED METAL PRODUCTS	1,214	198
35	MACHINERY, EXCEPT ELECTRICAL	11,863	2,823
36	ELECTRIC AND ELECTRONIC EQUIPMENT	5,439	3,526
37	TRANSPORTATION EQUIPMENT	12,988	1,798
38	INSTRUMENTS AND RELATED PRODUCTS	4,033	929
39	MISCELLANEOUS MANUFACTURING INDUSTRIES	580	580
44	WATER TRANSPORTATION	1,708
45	TRANSPORTATION BY AIR	8,825	57
49	ELECTRIC, GAS, AND SANITARY SERVICES	765	116
50	WHOLESALE TRADE - DURABLE GOODS	1,199
73	BUSINESS SERVICES	5
75	AUTO REPAIR, SERVICES, AND GARAGES	2,197
80	HEALTH SERVICES	1,284	582
TOTAL		100,136	15,210

*(1) By survey design, not all 2-digit SICs were surveyed. (2) The estimates for each 2-digit SIC apply only to the 3- and 4-digit SICs surveyed within the 2-digit SIC. Not all SICs were surveyed. (3) When using the estimates, standard errors associated with estimates should be considered. (4) Potential exposures to a chemical agent are categorized as actual (i.e., the surveyor observed the use of the specific agent) or tradename (i.e., the surveyor observed the use of a tradename product known to contain the specific agent). The estimates presented in the table combine both categories.